Scholarlink

<p>The thermal failure mechanisms of building exterior windows under fire exposure are governed by the coupled responses of multiple components, making their quantitative evaluation particularly challenging. In this study, the failure-related factors are classified into three subsystems: glass, profile, and sealing. 4 types of 65-series double-glazed single-chamber windows (6 + 9A + 6), constructed using fire-resistant glass, aluminum alloy profiles, polyvinyl chloride (PVC) profiles, ethylene propylene diene monomer (EPDM) seals, and expanded graphite (EG) seals, were tested under simulated confined-space fire scenarios. The temperature fields and thermal response characteristics of each subsystem were systematically analyzed across different heating stages. Grey relational analysis was further applied to quantify the influence of each subsystem on the overall failure process. The results indicate that aluminum alloy windows predominantly fail due to the combustion, carbonization, and detachment of sealing components, while PVC windows mainly fail through the thermal softening and deformation of the frame material. The temperature evolution of the window assemblies exhibits distinct stage-wise behavior, reflecting their different thermal inertia and degradation patterns. Moreover, the profile subsystem shows the highest correlation with thermal failure (0.957), followed by the sealing subsystem (0.864), whereas the glass subsystem exhibits the lowest correlation, owing to its delayed response and higher thermal stability. These findings provide a comprehensive basis for identifying the critical components governing window failure under fire conditions.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Comprehensive experimental study on thermal failure mechanisms of exterior windows in confined building spaces

  • 期刊论文

  • 发表日期：

    2025年12月16日

查看全文
  • Jie Yang,
  • Yaqing Li,
  • Jun Deng,
  • Yutao Zhang,
  • Xichen Zhang,
  • Saeed Zeinali Heris

摘要

The thermal failure mechanisms of building exterior windows under fire exposure are governed by the coupled responses of multiple components, making their quantitative evaluation particularly challenging. In this study, the failure-related factors are classified into three subsystems: glass, profile, and sealing. 4 types of 65-series double-glazed single-chamber windows (6 + 9A + 6), constructed using fire-resistant glass, aluminum alloy profiles, polyvinyl chloride (PVC) profiles, ethylene propylene diene monomer (EPDM) seals, and expanded graphite (EG) seals, were tested under simulated confined-space fire scenarios. The temperature fields and thermal response characteristics of each subsystem were systematically analyzed across different heating stages. Grey relational analysis was further applied to quantify the influence of each subsystem on the overall failure process. The results indicate that aluminum alloy windows predominantly fail due to the combustion, carbonization, and detachment of sealing components, while PVC windows mainly fail through the thermal softening and deformation of the frame material. The temperature evolution of the window assemblies exhibits distinct stage-wise behavior, reflecting their different thermal inertia and degradation patterns. Moreover, the profile subsystem shows the highest correlation with thermal failure (0.957), followed by the sealing subsystem (0.864), whereas the glass subsystem exhibits the lowest correlation, owing to its delayed response and higher thermal stability. These findings provide a comprehensive basis for identifying the critical components governing window failure under fire conditions.